Performance Eng CSFS58331LW Ford 9 Inch Center Section 5.83 Ratio 31 Spline

The Performance Eng CSFS58331LW is a fully assembled Ford 9-inch center section, also known as a third member, designed for high-performance rear axle applications. This complete differential assembly features a 5.83:1 gear ratio and 31-spline axle compatibility, making it ideal for drag racing and applications requiring extremely high torque multiplication and acceleration.

Key Features:

• 5.83:1 gear ratio for maximum acceleration and low-end torque
• 31-spline axle shafts for increased strength over 28-spline designs
• Lightweight (LW) construction for reduced rotating mass
• Ford 9-inch differential housing compatibility
• Fully assembled and ready to install
• Precision gear setup for optimal performance and longevity

The Ford 9-inch center section is a drop-in component that transfers power from the driveshaft to the rear axles. This particular unit's 5.83 ratio is among the lowest available, providing exceptional off-the-line performance for dedicated racing applications. The 31-spline configuration offers superior strength compared to standard 28-spline setups, making it suitable for high-horsepower vehicles. Installation requires mounting the center section into the Ford 9-inch rear housing using appropriate mounting hardware.